[8u-communication] Updates to JDK 8 Updates Project pages

[Seán Coffey]

As per previous discussions [1], the OpenJDK 8 Updates Project pages [2] 
had some stale references to JDK 9 fix requirements. With the new JDK 
release model, I've made the following edits :

Ground Rules : Rule 1:
* JDK 9 fix requirement removed :
==============================

All changes that are not specific to JDK 8 Update MUST go into the JDK
Project first. As a special exception, a change MAY go into JDK 8 Update if
it is at the same time also proposed for inclusion into JDK.

Approval template :
* substituted the JDK 9 change link requirement with one for changeset 
link to JDK Project.
==============================

either a link to the publicly visible webrev or a link to the original 
changeset
in the <a href="http://openjdk.java.net/projects/jdk/"> JDK Project</a> 
if it's the
same patch.

requested that a link to review thread of parent bug fix be included 
where relevant.

Phase2 approval template
Similar to above - substituted the JDK 9 change link requirement with a 
requirement for changeset link to JDK Project.
==============================

Code review :
Substituted JDK 9 with JDK Project references
==============================

Q and A document :
minor updates :
Corrected link to the OpenJDK bylaws document (was referring to draft)
Removed references to JDK 9 Project fix requirements for JDK 8u fixes. 
Substituted with JDK Project.
==============================

[1] 
http://mail.openjdk.java.net/pipermail/jdk8u-dev/2018-February/007276.html
[2] http://openjdk.java.net/projects/jdk8u/

-- 
Regards,
Sean.